@book {2227, title = {Influenza Immunization Rates for Selected at Risk Populations Among the U.S. Adult Civilian Noninstitutionalized Population, 2006}, series = {Statistical brief}, number = {$\#$226}, year = {2008}, publisher = {Agency for Healthcare Research and Quality}, organization = {Agency for Healthcare Research and Quality}, address = {Rockville, Md.}, author = {Anita Soni} }